ospfd/ospf_routemap.c

   1 /*
   2  * Route map function of ospfd.
   3  * Copyright (C) 2000 IP Infusion Inc.
   4  *
   5  * Written by Toshiaki Takada.
   6  *
   7  * This file is part of GNU Zebra.
   8  *
   9  * GNU Zebra is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2, or (at your option) any
  12  * later version.
  13  *
  14  * GNU Zebra is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; see the file COPYING; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <zebra.h>
  25
  26 #include "memory.h"
  27 #include "prefix.h"
  28 #include "table.h"
  29 #include "vty.h"
  30 #include "routemap.h"
  31 #include "command.h"
  32 #include "log.h"
  33 #include "plist.h"
  34 #include "vrf.h"
  35
  36 #include "ospfd/ospfd.h"
  37 #include "ospfd/ospf_asbr.h"
  38 #include "ospfd/ospf_interface.h"
  39 #include "ospfd/ospf_lsa.h"
  40 #include "ospfd/ospf_route.h"
  41 #include "ospfd/ospf_zebra.h"
  42
  43 /* Hook function for updating route_map assignment. */
  44 static void ospf_route_map_update(const char *name)
  45 {
  46         struct ospf *ospf;
  47         int type;
  48
  49         /* If OSPF instatnce does not exist, return right now. */
  50         ospf = ospf_lookup();
  51         if (ospf == NULL)
  52                 return;
  53
  54         /* Update route-map */
  55         for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
  56                 struct list *red_list;
  57                 struct listnode *node;
  58                 struct ospf_redist *red;
  59
  60                 red_list = ospf->redist[type];
  61                 if (!red_list)
  62                         continue;
  63
  64                 for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) {
  65                         if (ROUTEMAP_NAME(red)
  66                             && strcmp(ROUTEMAP_NAME(red), name) == 0) {
  67                                 /* Keep old route-map. */
  68                                 struct route_map *old = ROUTEMAP(red);
  69
  70                                 /* Update route-map. */
  71                                 ROUTEMAP(red) = route_map_lookup_by_name(
  72                                         ROUTEMAP_NAME(red));
  73
  74                                 /* No update for this distribute type. */
  75                                 if (old == NULL && ROUTEMAP(red) == NULL)
  76                                         continue;
  77
  78                                 ospf_distribute_list_update(ospf, type,
  79                                                             red->instance);
  80                         }
  81                 }
  82         }
  83 }
  84
  85 static void ospf_route_map_event(route_map_event_t event, const char *name)
  86 {
  87         struct ospf *ospf;
  88         int type;
  89
  90         /* If OSPF instatnce does not exist, return right now. */
  91         ospf = ospf_lookup();
  92         if (ospf == NULL)
  93                 return;
  94
  95         for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
  96                 struct list *red_list;
  97                 struct listnode *node;
  98                 struct ospf_redist *red;
  99
 100                 red_list = ospf->redist[type];
 101                 if (!red_list)
 102                         continue;
 103
 104                 for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) {
 105                         if (ROUTEMAP_NAME(red) && ROUTEMAP(red)
 106                             && !strcmp(ROUTEMAP_NAME(red), name)) {
 107                                 ospf_distribute_list_update(ospf, type,
 108                                                             red->instance);
 109                         }
 110                 }
 111         }
 112 }
 113
 114 /* `match ip netxthop ' */
 115 /* Match function return 1 if match is success else return zero. */
 116 static route_map_result_t route_match_ip_nexthop(void *rule,
 117                                                  struct prefix *prefix,
 118                                                  route_map_object_t type,
 119                                                  void *object)
 120 {
 121         struct access_list *alist;
 122         struct external_info *ei = object;
 123         struct prefix_ipv4 p;
 124
 125         if (type == RMAP_OSPF) {
 126                 p.family = AF_INET;
 127                 p.prefix = ei->nexthop;
 128                 p.prefixlen = IPV4_MAX_BITLEN;
 129
 130                 alist = access_list_lookup(AFI_IP, (char *)rule);
 131                 if (alist == NULL)
 132                         return RMAP_NOMATCH;
 133
 134                 return (access_list_apply(alist, &p) == FILTER_DENY
 135                                 ? RMAP_NOMATCH
 136                                 : RMAP_MATCH);
 137         }
 138         return RMAP_NOMATCH;
 139 }
 140
 141 /* Route map `ip next-hop' match statement. `arg' should be
 142    access-list name. */
 143 static void *route_match_ip_nexthop_compile(const char *arg)
 144 {
 145         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 146 }
 147
 148 /* Free route map's compiled `ip address' value. */
 149 static void route_match_ip_nexthop_free(void *rule)
 150 {
 151         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 152 }
 153
 154 /* Route map commands for metric matching. */
 155 struct route_map_rule_cmd route_match_ip_nexthop_cmd = {
 156         "ip next-hop", route_match_ip_nexthop, route_match_ip_nexthop_compile,
 157         route_match_ip_nexthop_free};
 158
 159 /* `match ip next-hop prefix-list PREFIX_LIST' */
 160
 161 static route_map_result_t
 162 route_match_ip_next_hop_prefix_list(void *rule, struct prefix *prefix,
 163                                     route_map_object_t type, void *object)
 164 {
 165         struct prefix_list *plist;
 166         struct external_info *ei = object;
 167         struct prefix_ipv4 p;
 168
 169         if (type == RMAP_OSPF) {
 170                 p.family = AF_INET;
 171                 p.prefix = ei->nexthop;
 172                 p.prefixlen = IPV4_MAX_BITLEN;
 173
 174                 plist = prefix_list_lookup(AFI_IP, (char *)rule);
 175                 if (plist == NULL)
 176                         return RMAP_NOMATCH;
 177
 178                 return (prefix_list_apply(plist, &p) == PREFIX_DENY
 179                                 ? RMAP_NOMATCH
 180                                 : RMAP_MATCH);
 181         }
 182         return RMAP_NOMATCH;
 183 }
 184
 185 static void *route_match_ip_next_hop_prefix_list_compile(const char *arg)
 186 {
 187         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 188 }
 189
 190 static void route_match_ip_next_hop_prefix_list_free(void *rule)
 191 {
 192         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 193 }
 194
 195 struct route_map_rule_cmd route_match_ip_next_hop_prefix_list_cmd = {
 196         "ip next-hop prefix-list", route_match_ip_next_hop_prefix_list,
 197         route_match_ip_next_hop_prefix_list_compile,
 198         route_match_ip_next_hop_prefix_list_free};
 199
 200 /* `match ip address IP_ACCESS_LIST' */
 201 /* Match function should return 1 if match is success else return
 202    zero. */
 203 static route_map_result_t route_match_ip_address(void *rule,
 204                                                  struct prefix *prefix,
 205                                                  route_map_object_t type,
 206                                                  void *object)
 207 {
 208         struct access_list *alist;
 209         /* struct prefix_ipv4 match; */
 210
 211         if (type == RMAP_OSPF) {
 212                 alist = access_list_lookup(AFI_IP, (char *)rule);
 213                 if (alist == NULL)
 214                         return RMAP_NOMATCH;
 215
 216                 return (access_list_apply(alist, prefix) == FILTER_DENY
 217                                 ? RMAP_NOMATCH
 218                                 : RMAP_MATCH);
 219         }
 220         return RMAP_NOMATCH;
 221 }
 222
 223 /* Route map `ip address' match statement.  `arg' should be
 224    access-list name. */
 225 static void *route_match_ip_address_compile(const char *arg)
 226 {
 227         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 228 }
 229
 230 /* Free route map's compiled `ip address' value. */
 231 static void route_match_ip_address_free(void *rule)
 232 {
 233         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 234 }
 235
 236 /* Route map commands for ip address matching. */
 237 struct route_map_rule_cmd route_match_ip_address_cmd = {
 238         "ip address", route_match_ip_address, route_match_ip_address_compile,
 239         route_match_ip_address_free};
 240
 241 /* `match ip address prefix-list PREFIX_LIST' */
 242 static route_map_result_t
 243 route_match_ip_address_prefix_list(void *rule, struct prefix *prefix,
 244                                    route_map_object_t type, void *object)
 245 {
 246         struct prefix_list *plist;
 247
 248         if (type == RMAP_OSPF) {
 249                 plist = prefix_list_lookup(AFI_IP, (char *)rule);
 250                 if (plist == NULL)
 251                         return RMAP_NOMATCH;
 252
 253                 return (prefix_list_apply(plist, prefix) == PREFIX_DENY
 254                                 ? RMAP_NOMATCH
 255                                 : RMAP_MATCH);
 256         }
 257         return RMAP_NOMATCH;
 258 }
 259
 260 static void *route_match_ip_address_prefix_list_compile(const char *arg)
 261 {
 262         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 263 }
 264
 265 static void route_match_ip_address_prefix_list_free(void *rule)
 266 {
 267         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 268 }
 269
 270 struct route_map_rule_cmd route_match_ip_address_prefix_list_cmd = {
 271         "ip address prefix-list", route_match_ip_address_prefix_list,
 272         route_match_ip_address_prefix_list_compile,
 273         route_match_ip_address_prefix_list_free};
 274
 275 /* `match interface IFNAME' */
 276 /* Match function should return 1 if match is success else return
 277    zero. */
 278 static route_map_result_t route_match_interface(void *rule,
 279                                                 struct prefix *prefix,
 280                                                 route_map_object_t type,
 281                                                 void *object)
 282 {
 283         struct interface *ifp;
 284         struct external_info *ei;
 285
 286         if (type == RMAP_OSPF) {
 287                 ei = object;
 288                 ifp = if_lookup_by_name((char *)rule, VRF_DEFAULT);
 289
 290                 if (ifp == NULL || ifp->ifindex != ei->ifindex)
 291                         return RMAP_NOMATCH;
 292
 293                 return RMAP_MATCH;
 294         }
 295         return RMAP_NOMATCH;
 296 }
 297
 298 /* Route map `interface' match statement.  `arg' should be
 299    interface name. */
 300 static void *route_match_interface_compile(const char *arg)
 301 {
 302         return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
 303 }
 304
 305 /* Free route map's compiled `interface' value. */
 306 static void route_match_interface_free(void *rule)
 307 {
 308         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 309 }
 310
 311 /* Route map commands for ip address matching. */
 312 struct route_map_rule_cmd route_match_interface_cmd = {
 313         "interface", route_match_interface, route_match_interface_compile,
 314         route_match_interface_free};
 315
 316 /* Match function return 1 if match is success else return zero. */
 317 static route_map_result_t route_match_tag(void *rule, struct prefix *prefix,
 318                                           route_map_object_t type, void *object)
 319 {
 320         route_tag_t *tag;
 321         struct external_info *ei;
 322
 323         if (type == RMAP_OSPF) {
 324                 tag = rule;
 325                 ei = object;
 326
 327                 return ((ei->tag == *tag) ? RMAP_MATCH : RMAP_NOMATCH);
 328         }
 329
 330         return RMAP_NOMATCH;
 331 }
 332
 333 /* Route map commands for tag matching. */
 334 static struct route_map_rule_cmd route_match_tag_cmd = {
 335         "tag", route_match_tag, route_map_rule_tag_compile,
 336         route_map_rule_tag_free,
 337 };
 338
 339 struct ospf_metric {
 340         bool used;
 341         u_int32_t metric;
 342 };
 343
 344 /* `set metric METRIC' */
 345 /* Set metric to attribute. */
 346 static route_map_result_t route_set_metric(void *rule, struct prefix *prefix,
 347                                            route_map_object_t type,
 348                                            void *object)
 349 {
 350         struct ospf_metric *metric;
 351         struct external_info *ei;
 352
 353         if (type == RMAP_OSPF) {
 354                 /* Fetch routemap's rule information. */
 355                 metric = rule;
 356                 ei = object;
 357
 358                 /* Set metric out value. */
 359                 if (metric->used)
 360                         ei->route_map_set.metric = metric->metric;
 361         }
 362         return RMAP_OKAY;
 363 }
 364
 365 /* set metric compilation. */
 366 static void *route_set_metric_compile(const char *arg)
 367 {
 368         struct ospf_metric *metric;
 369
 370         metric = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(u_int32_t));
 371         metric->used = false;
 372
 373         /* OSPF doesn't support the +/- in
 374            set metric <+/-metric> check
 375            Ignore the +/- component */
 376         if (!all_digit(arg)) {
 377                 if ((arg[0] == '+' || arg[0] == '-') && all_digit(arg + 1)) {
 378                         zlog_warn("OSPF does not support 'set metric +/-'");
 379                         arg++;
 380                 } else {
 381                         if (strmatch(arg, "+rtt") || strmatch(arg, "-rtt"))
 382                                 zlog_warn(
 383                                         "OSPF does not support 'set metric +rtt / -rtt'");
 384
 385                         return metric;
 386                 }
 387         }
 388         metric->metric = strtoul(arg, NULL, 10);
 389         metric->used = true;
 390
 391         return metric;
 392 }
 393
 394 /* Free route map's compiled `set metric' value. */
 395 static void route_set_metric_free(void *rule)
 396 {
 397         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 398 }
 399
 400 /* Set metric rule structure. */
 401 struct route_map_rule_cmd route_set_metric_cmd = {
 402         "metric", route_set_metric, route_set_metric_compile,
 403         route_set_metric_free,
 404 };
 405
 406 /* `set metric-type TYPE' */
 407 /* Set metric-type to attribute. */
 408 static route_map_result_t route_set_metric_type(void *rule,
 409                                                 struct prefix *prefix,
 410                                                 route_map_object_t type,
 411                                                 void *object)
 412 {
 413         u_int32_t *metric_type;
 414         struct external_info *ei;
 415
 416         if (type == RMAP_OSPF) {
 417                 /* Fetch routemap's rule information. */
 418                 metric_type = rule;
 419                 ei = object;
 420
 421                 /* Set metric out value. */
 422                 ei->route_map_set.metric_type = *metric_type;
 423         }
 424         return RMAP_OKAY;
 425 }
 426
 427 /* set metric-type compilation. */
 428 static void *route_set_metric_type_compile(const char *arg)
 429 {
 430         u_int32_t *metric_type;
 431
 432         metric_type = XCALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(u_int32_t));
 433         if (strcmp(arg, "type-1") == 0)
 434                 *metric_type = EXTERNAL_METRIC_TYPE_1;
 435         else if (strcmp(arg, "type-2") == 0)
 436                 *metric_type = EXTERNAL_METRIC_TYPE_2;
 437
 438         if (*metric_type == EXTERNAL_METRIC_TYPE_1
 439             || *metric_type == EXTERNAL_METRIC_TYPE_2)
 440                 return metric_type;
 441
 442         XFREE(MTYPE_ROUTE_MAP_COMPILED, metric_type);
 443         return NULL;
 444 }
 445
 446 /* Free route map's compiled `set metric-type' value. */
 447 static void route_set_metric_type_free(void *rule)
 448 {
 449         XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
 450 }
 451
 452 /* Set metric rule structure. */
 453 struct route_map_rule_cmd route_set_metric_type_cmd = {
 454         "metric-type", route_set_metric_type, route_set_metric_type_compile,
 455         route_set_metric_type_free,
 456 };
 457
 458 static route_map_result_t route_set_tag(void *rule, struct prefix *prefix,
 459                                         route_map_object_t type, void *object)
 460 {
 461         route_tag_t *tag;
 462         struct external_info *ei;
 463
 464         if (type == RMAP_OSPF) {
 465                 tag = rule;
 466                 ei = object;
 467
 468                 /* Set tag value */
 469                 ei->tag = *tag;
 470         }
 471
 472         return RMAP_OKAY;
 473 }
 474
 475 /* Route map commands for tag set. */
 476 static struct route_map_rule_cmd route_set_tag_cmd = {
 477         "tag", route_set_tag, route_map_rule_tag_compile,
 478         route_map_rule_tag_free,
 479 };
 480
 481 DEFUN (set_metric_type,
 482        set_metric_type_cmd,
 483        "set metric-type <type-1|type-2>",
 484        SET_STR
 485        "Type of metric for destination routing protocol\n"
 486        "OSPF[6] external type 1 metric\n"
 487        "OSPF[6] external type 2 metric\n")
 488 {
 489         char *ext = argv[2]->text;
 490         return generic_set_add(vty, VTY_GET_CONTEXT(route_map_index),
 491                                "metric-type", ext);
 492 }
 493
 494 DEFUN (no_set_metric_type,
 495        no_set_metric_type_cmd,
 496        "no set metric-type [<type-1|type-2>]",
 497        NO_STR
 498        SET_STR
 499        "Type of metric for destination routing protocol\n"
 500        "OSPF[6] external type 1 metric\n"
 501        "OSPF[6] external type 2 metric\n")
 502 {
 503         char *ext = (argc == 4) ? argv[3]->text : NULL;
 504         return generic_set_delete(vty, VTY_GET_CONTEXT(route_map_index),
 505                                   "metric-type", ext);
 506 }
 507
 508 /* Route-map init */
 509 void ospf_route_map_init(void)
 510 {
 511         route_map_init();
 512
 513         route_map_add_hook(ospf_route_map_update);
 514         route_map_delete_hook(ospf_route_map_update);
 515         route_map_event_hook(ospf_route_map_event);
 516
 517         route_map_set_metric_hook(generic_set_add);
 518         route_map_no_set_metric_hook(generic_set_delete);
 519
 520         route_map_match_ip_next_hop_hook(generic_match_add);
 521         route_map_no_match_ip_next_hop_hook(generic_match_delete);
 522
 523         route_map_match_interface_hook(generic_match_add);
 524         route_map_no_match_interface_hook(generic_match_delete);
 525
 526         route_map_match_ip_address_hook(generic_match_add);
 527         route_map_no_match_ip_address_hook(generic_match_delete);
 528
 529         route_map_match_ip_address_prefix_list_hook(generic_match_add);
 530         route_map_no_match_ip_address_prefix_list_hook(generic_match_delete);
 531
 532         route_map_match_ip_next_hop_prefix_list_hook(generic_match_add);
 533         route_map_no_match_ip_next_hop_prefix_list_hook(generic_match_delete);
 534
 535         route_map_match_tag_hook(generic_match_add);
 536         route_map_no_match_tag_hook(generic_match_delete);
 537
 538         route_map_set_metric_hook(generic_set_add);
 539         route_map_no_set_metric_hook(generic_set_delete);
 540
 541         route_map_set_tag_hook(generic_set_add);
 542         route_map_no_set_tag_hook(generic_set_delete);
 543
 544         route_map_install_match(&route_match_ip_nexthop_cmd);
 545         route_map_install_match(&route_match_ip_next_hop_prefix_list_cmd);
 546         route_map_install_match(&route_match_ip_address_cmd);
 547         route_map_install_match(&route_match_ip_address_prefix_list_cmd);
 548         route_map_install_match(&route_match_interface_cmd);
 549         route_map_install_match(&route_match_tag_cmd);
 550
 551         route_map_install_set(&route_set_metric_cmd);
 552         route_map_install_set(&route_set_metric_type_cmd);
 553         route_map_install_set(&route_set_tag_cmd);
 554
 555         install_element(RMAP_NODE, &set_metric_type_cmd);
 556         install_element(RMAP_NODE, &no_set_metric_type_cmd);
 557 }